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The SAMHDA Project
Statement of Commitment
Public Data (PDAS)
Restricted Data (RDAS)
NSDUH RDAS Documentation
Research Data Centers
Interactive NSDUH State Estimates
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What is SAMHDA?
How does SAMHDA prepare public-use data files for release?
How do I contact someone at SAMHDA for assistance?
How much do SAMHDA data sets cost?
How often does SAMHDA release new data files for download? Can I be notified?
What resources are available through SAMHDA?
Which studies are ongoing and which have ended?
Where do I go for treatment help?
Where can I find the older NSDUH reports?
What percentage of people with past year substance use disorders received treatment in the past year? Do you have any yearly report on this?
Where are the reports for TEDS and N-SSATS data?
How do I access NSDUH data at the level of Hispanic ethnicity?
Where can I find indicators at the state level of those who served in the military?
Where can I find statistics on substance use, substance use disorders, mental health, and treatment?
Is there a fee associated with restricted-use data?
When will the Restricted-use Data Analysis System (RDAS) be available?
Does RDAS contain NSDUH data prior to 2002?
What years of data does RDAS have?
Can RDAS produce state estimates?
Why is there not an RDAS dataset for 2013-2014?
Access to Data
How do I get permission to use the public-use data archived at SAMHDA?
What are the differences between PDAS and RDAS?
How do I access data?
How do I obtain information from DATA 2000?
I need state estimates for substance use and mental illness. Where can I find that?
What happened to my SAMHDA account from www.icpsr.umich.edu?
Can researchers in countries other than the U.S. access SAMHDA data?
Does TEDS-A and TEDS-D data include state-level data?
Where can I locate reports and detailed tables for NSDUH data?
Why are there fewer outcomes for the 2014-2015 state estimates than for previous publications of state estimates?
How do I access studies and series?
When will a study be released?
When will the 2017 NSDUH public release dataset be available?
Is there data available for substate areas, cities, or counties?
When will the 2016-2017 NSDUH State Estimates be available?
How can data be accessed on the SAMHDA site?
What are the differences between the public-use data and restricted-use data for NSDUH?
How to Cite SAMHDA Data
Why and how should I cite SAMHDA data?
Documentation & Survey Instruments
A data collection instrument is included in the documentation for a study. Can I use this instrument for my project?
What is a codebook?
What kind of documentation files do you provide?
Where do I get information about the names and meanings of variables?
Why can't I print my PDF codebook?
Where can I find more information about NSDUH reports?
How do I find a codebook?
Data Formats and Files
How do I interpret a record from an ASCII data file?
How do I read data into R?
How do I use Excel to import tab-delimited data?
I'm using SPSS on a Mac. I can't read ASCII data files using the SPSS setup file I downloaded. What do I do?
I downloaded data from your site, but my statistics application issues an error message that the file cannot be found.
I receive a "file not found" error when trying to use a setup file. What is wrong?
What is a SAS TRANSPORT file? How do I use it?
What kind of data formats does SAMHDA distribute? Do you have SPSS portable files? SAS transport? Stata?